LX 431 then FB 492 at Zurich
London Gatwick → Zurich → Sofia
Timetable, Zurich time
11:45LX 431 from London Gatwick at the gate
10:00FB 492 to Sofia leaves the gate
22 h 15 apart on the timetable, overnight
FB 492 leaves 22 h 15 after LX 431 arrives on the timetable: more than half a day, so not a connection we count.